Load Specifications
Load data in caliber 7 x 57 R with .284 | 140gr | Barnes MRX BT bullet and 59 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and Alliant Reloder-16.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 41,901 psi | 85% | 2582 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 42,032 psi | 85% | 2618 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 43,874 psi | 89% | 2717 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 82% | 43,627 psi | 88% | 2644 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 86% | 42,018 psi | 85% | 2595 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,482 psi | 86% | 2726 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 44,237 psi | 90% | 2671 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 84% | 41,872 psi | 85% | 2628 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 96% | 43,830 psi | 89% | 2733 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 92% | 44,092 psi | 89% | 2766 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,867 psi | 71% | 2559 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 42,902 psi | 87% | 2648 fps | 97.3% |
| Bofors RP3 | <<locked>> | 88% | 43,714 psi | 89% | 2674 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 82% | 44,222 psi | 90% | 2674 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 86% | 42,148 psi | 85% | 2625 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 82% | 44,034 psi | 89% | 2657 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 42,728 psi | 87% | 2667 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 42,525 psi | 86% | 2677 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,954 psi | 71% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 42,511 psi | 86% | 2612 fps | 98.6% |
| IMR 3031 | <<locked>> | 82% | 43,323 psi | 88% | 2654 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 44,135 psi | 90% | 2631 fps | 98.2% |
| IMR 4831 | <<locked>> | 96% | 42,148 psi | 85% | 2667 fps | 97.1% |
| IMR 4895 | <<locked>> | 84% | 42,888 psi | 87% | 2661 fps | 98.4% |
| Lovex D073.6 | <<locked>> | 82% | 42,250 psi | 86% | 2621 fps | 99.9% |
| Lovex S060 | <<locked>> | 82% | 44,048 psi | 89% | 2585 fps | 98.5% |
| Lovex S062 | <<locked>> | 86% | 43,743 psi | 89% | 2631 fps | 99.3% |
| Norma 201 | <<locked>> | 82% | 42,540 psi | 86% | 2595 fps | 99.2% |
| Norma 202 | <<locked>> | 82% | 42,830 psi | 87% | 2608 fps | 100% |
| Norma 203B | <<locked>> | 86% | 43,990 psi | 89% | 2674 fps | 98.5% |
| Norma URP | <<locked>> | 96% | 44,048 psi | 89% | 2717 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 86% | 43,598 psi | 88% | 2684 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,244 psi | 71% | 1749 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 43,888 psi | 89% | 2733 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 43,816 psi | 89% | 2772 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 43,830 psi | 89% | 2740 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,396 psi | 90% | 2756 fps | 96.5% |
| Rottweil R 902 | <<locked>> | 84% | 43,091 psi | 87% | 2598 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 90% | 43,903 psi | 89% | 2671 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 82% | 42,250 psi | 86% | 2621 fps | 99.9% |
| Shooters World Precision | <<locked>> | 86% | 43,743 psi | 89% | 2631 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 42,583 psi | 86% | 2674 fps | 98.2% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 43,729 psi | 89% | 2628 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,119 psi | 85% | 2612 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 44,382 psi | 90% | 2562 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 44,295 psi | 90% | 2562 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 43,714 psi | 89% | 2559 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 43,700 psi | 89% | 2631 fps | 98.4% |
| Somchem S355 | <<locked>> | 88% | 41,872 psi | 85% | 2618 fps | 98.5% |
| Somchem S365 | <<locked>> | 98% | 41,756 psi | 85% | 2717 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 84% | 42,351 psi | 86% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 43,265 psi | 88% | 2592 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 42,946 psi | 87% | 2608 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 94% | 43,294 psi | 88% | 2664 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 86% | 44,541 psi | 90% | 2635 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 42,424 psi | 86% | 2664 fps | 96.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,318 psi | 76% | 2635 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 44,005 psi | 89% | 2654 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 84% | 44,324 psi | 90% | 2671 fps | 99% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 36,434 psi | 74% | 2480 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 34,476 psi | 70% | 2467 fps | 99.5% |
| Accurate 4350 | <<locked>> | 90% | 35,607 psi | 72% | 2549 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 40,886 psi | 83% | 2592 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 34,708 psi | 70% | 2438 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,014 psi | 75% | 2602 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,113 psi | 69% | 2461 fps | 96.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,680 psi | 74% | 2520 fps | 96.2% |
| Alliant Reloder-16 | 43.4 gr | 90% | 36,332 psi | 74% | 2562 fps | 95.1% |
| Alliant Reloder-17 | 43.6 gr | 84% | 33,518 psi | 68% | 2523 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,895 psi | 67% | 2507 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,972 psi | 81% | 2589 fps | 96.5% |
| Bofors RP3 | <<locked>> | 80% | 33,170 psi | 67% | 2451 fps | 96.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,408 psi | 84% | 2618 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 84% | 39,450 psi | 80% | 2569 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 41,220 psi | 84% | 2602 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 33,083 psi | 67% | 2457 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,231 psi | 76% | 2569 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,773 psi | 52% | 1522 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,769 psi | 81% | 2556 fps | 98% |
| IMR 3031 | <<locked>> | 80% | 40,640 psi | 82% | 2605 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,376 psi | 74% | 2470 fps | 96.1% |
| IMR 4831 | <<locked>> | 92% | 36,782 psi | 75% | 2556 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 37,536 psi | 76% | 2549 fps | 97.1% |
| Lovex D073.6 | <<locked>> | 80% | 39,450 psi | 80% | 2569 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 41,307 psi | 84% | 2536 fps | 98% |
| Lovex S062 | <<locked>> | 80% | 36,085 psi | 73% | 2477 fps | 97.9% |
| Norma 201 | <<locked>> | 80% | 39,798 psi | 81% | 2543 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 40,321 psi | 82% | 2562 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 36,027 psi | 73% | 2507 fps | 96.6% |
| Norma URP | <<locked>> | 90% | 36,230 psi | 73% | 2552 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 35,549 psi | 72% | 2516 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,107 psi | 53% | 1562 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,189 psi | 77% | 2615 fps | 96.6% |
| ReloadSwiss RS 60 | 41.5 gr | 80% | 31,183 psi | 63% | 2470 fps | 97.6% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 38,029 psi | 77% | 2621 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,611 psi | 84% | 2697 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 37,971 psi | 77% | 2497 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 31,299 psi | 63% | 2398 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,450 psi | 80% | 2569 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 36,085 psi | 73% | 2477 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,532 psi | 66% | 2448 fps | 95% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,930 psi | 83% | 2572 fps | 95.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,479 psi | 80% | 2559 fps | 97.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,481 psi | 84% | 2510 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,200 psi | 69% | 2375 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 40,988 psi | 83% | 2513 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,683 psi | 83% | 2572 fps | 97.7% |
| Somchem S355 | <<locked>> | 80% | 32,242 psi | 65% | 2408 fps | 95.8% |
| Somchem S365 | <<locked>> | 86% | 28,123 psi | 57% | 2382 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 37,072 psi | 75% | 2487 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,101 psi | 77% | 2497 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 30,763 psi | 62% | 2352 fps | 96.8% |
| Vihtavuori N160 | <<locked>> | 90% | 38,130 psi | 77% | 2559 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 36,637 psi | 74% | 2480 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 90% | 37,173 psi | 75% | 2556 fps | 95% |
| Vihtavuori N555 | <<locked>> | 98% | 35,085 psi | 71% | 2582 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,299 psi | 63% | 2372 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,856 psi | 79% | 2562 fps | 97.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 59 powders for 7 x 57 R loaded with the .284 | 140gr | Barnes MRX BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,772 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,772 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 59 of the 59 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, ReloadSwiss RS 14 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 60, Alliant Reloder-17, Alliant Reloder-16 rank at the top here: for 7 x 57 R with the .284 | 140gr | Barnes MRX BT they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.